Improvement in sewing-machine needles



W. O.GROVEI Sewing Machine Needle.

Patented March 4, 1862.

W A w// W 72 Nn*E TATES WILLIAM O. GROVER, OF BOSTON, MASSACHUSETTS.

IMPROVEMNT IN SEWING-MAHINE NEEDLES.

Specification forming part of Letters Patent NO. 34,571, dated March 4,1862.

T0 all whom iZ may 009mm:

Be it known that I, WILLIAM O. GROVER,

of the city of Boston, connty of Snftolk, and State of Massachusetts,have invented a neW and usetul Improvement in the Needles ofSewing-Machines; and I do hereby declare that the following, taken inconnection with the drawings, is a full, elear, and exact descriptonthereof.

Tbe drawings are made on a large scale, so

as to show the improvement clearly, which is and continuing sincethattime, have been.

made with grooves either on one or both sides thereof, such groovescommencing below the eye and extending upward toward the shank et theneedle, at least'so far as the point up to which the needle penetratesthe cloth. Tbese grooves protect the tbread and hold it in properposition on the body of the needle toform the 100p. They also aid inlaying the stitch. If the needle were not grooved the 100p, whenforming, might bulge out from the needles in a direction unsuitable forthe 611-- trance of the shuttle or hook or non-perforating eye-pointedinstrument acting in connection with the piereing-needle to make astitch. The only objection to the use'ot the grooves is that theysometimes prevent the thread from bnlging out to form the 100p wben theneedle is retracted, owing to the groove bein'g too narrow and deep, or,owing to the fact that the edges of the groove are imperfectlyconstrncted, the smallest feather-edge on either side of the groovecaLtching thetbread and prventing the formation of a 100p. lt has beenattempted to remedy this evil by grooving the needle on one side only;but other and serions ditficnlties are eneountered, owing to the factthat when one groove only is used the thread is not thoroughlyprotected, and is, moreover, at liberty to twist around the needles, notbeing held in place by a groove. When the thread thus twists, a loop isformcd on the wrong side of the needle and the point of the interloopinginstrument sometimes does not enter it.

My improvement, as I have ascertained by experiments, does remedy thedifficulty and also insures a more periect 100p than the twogroovedneedle, even when both grooveS are of proper dimensions and of perfectconstrne tien on their edges; and my invention consists in providing theneedle with a continuons groove on one side in combination with aninterrupted groove on the other side, as breinafter desoribed.

By reference to the drawings, it will be perceived that the needle isgrooved continuously on one side.from a point a little below the eyewell up toward the shank, as from a to I), and

.that on the other side there is a short groove in the vicinity of theeye, as from 0 to d, then an ungrooved space from (1 to e, and thonanother groove from 6 tof. The blank or un- V grooved space should be atthat point of the needle at which the point of the shttle, bock, orother instrument aeting to seize a 100p enters, and the proportionallengths and the precise locations of the grooves shown in the drawingsare such as I prefer, althongh the proportional and absolnte lengths andthe positions may be varied as may be required by the precise instrumentin which the needle is bnlging ont or protrusion at the precise pointwhere the greatest protrusion is needed. Owing to the fact that theneedle is not grooved at the point where the shuttle or other seizinginstrument enters, avers small protrusion will insnre a snfficient spacefor the entrance of a point, and the interrupted groove controls thethread sufficiently to prevent any twisting of the needle-thread aroundthe body of the needle. These eiects resnlting from myinvention willbeapparent to those well instrncted in the use or construction ofsewingmachines, and when carefullyconsidered,even

by those who are not well skilled, will prove that there is considerablemerit in that which 130 the careless or uninformed observer would Intestimony whereof I have hereunto subappear 130 be,, merely a capriciouschange of 'scribed my name, in the city of Boston, on form. this 3lstday of October, A. D. 1860.

I daim as of my own inventionr An eye-pointed needle having an inter-GBOVER' rupted groom on one side and a. continuous In presence ofgrooveon the other, substantially such as are JAS. H. BROWN, herein described.I. O. VVDE.

